Add com_err reference

And point people to it when we mention com_err.

Change-Id: I3b930b415b21fe5f95cc69ac3cc92aff12d19d94
Fix typo

These constants are key usage numbers, not keys themselves.

Change-Id: I63be6941ad33cc41c31734c0dee447ae2accad49
Use less-deceptive art for AUTH

Don't imply that the MIC is a multiple of four octets in length,
and explicitly disclaim alignment of the following payload.

Change-Id: I8e4ac3ed0e2595270df8d00ce471d318d2d009c8
Error table base for RXGK

Change-Id: Ic95583503adac850ede6697f93e21d2b7714c173
Spelling fix

English is complicated.  Thanks to Mark Vitale.

Change-Id: Ib0dec1a1668931c1699b459da9fb897f878eb5b9